;+ ; NAME: ; ColorButtonBitmap ; ; PURPOSE: ; ; The purpose of this program is to create a 24-bit bitmap that can be used to ; create a colored widget button. ; ; AUTHOR: ; ; FANNING SOFTWARE CONSULTING ; David Fanning, Ph.D. ; 1645 Sheely Drive ; Fort Collins, CO 80526 USA ; Phone: 970-221-0438 ; E-mail: david@idlcoyote.com ; Coyote's Guide to IDL Programming: http://www.idlcoyote.com ; ; CATEGORY: ; ; Widget Programming ; ; CALLING SEQUENCE: ; ; bitmap = ColorButtonBitmap(theText) ; button = Widget_Button(tlb, Value=bitmap) ; ; REQUIRED INPUTS: ; ; theText - The text you wish to have on the button. ; ; OUTPUTS: ; ; bitmap - A 3xMxN byte array, representing a 24-bit image that is used ; as a button value. ; ; OPTIONAL KEYWORDS: ; ; BGCOLOR - The name of the background color. For example, 'Yellow', 'Tan', etc. ; The name must be compatible with names appropriate for cgColor. ; ; FGCOLOR - The name of the foreground color. For example, 'Navy', 'Black', etc. ; The name must be compatible with names appropriate for cgColor. ; ; ; DEPENDENCIES: ; ; Reqires cgColor from the Coyote Library: ; ; http://www.idlcoyote.com/programs/cgColor.pro ; ; EXAMPLE: ; ; tlb = Widget_Base(/Row, /Exclusive) ; button1 = Widget_Button(tlb, Value=ColorButtonBitmap('Button 1')) ; Normal button. ; button2 = Widget_Button(tlb, Value=ColorButtonBitmap('Button 2', FGCOLOR='YELLOW', BGCOLOR='NAVY')) ; button3 = Widget_Button(tlb, Value=ColorButtonBitmap('Button 3', BGCOLOR='YELLOW', FGCOLOR='NAVY')) ; Widget_Control, tlb, /Realize ; ; MODIFICATION HISTORY: ; ; Written by David Fanning, May 25, 2007 based on code named BitmapForButtonText supplied to the IDL ; newsgroup by Dick Jackson: http://www.idlcoyote.com/tip_examples/bitmapforbuttontext.pro. ; Fixed a problem with foreground and background colors that caused them to work correctly only ; when color decomposition is on--as it should be :-). 6 May 2009. ;- ;******************************************************************************************; ; Copyright (c) 2008, by Fanning Software Consulting, Inc. ; ; All rights reserved. ; ; ; ; Redistribution and use in source and binary forms, with or without ; ; modification, are permitted provided that the following conditions are met: ; ; ; ; * Redistributions of source code must retain the above copyright ; ; notice, this list of conditions and the following disclaimer. ; ; * Redistributions in binary form must reproduce the above copyright ; ; notice, this list of conditions and the following disclaimer in the ; ; documentation and/or other materials provided with the distribution. ; ; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ; ; contributors may be used to endorse or promote products derived from this ; ; software without specific prior written permission. ; ; ; ; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ; ; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ; ; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ; ; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ; ; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ; ; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ; ; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ; ; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ; ; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ; ; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ; ;******************************************************************************************; FUNCTION ColorButtonBitmap, theText, BGColor=bgcolor, FGColor=fgcolor ;; Error handling. Return to caller. ON_ERROR, 2 ;; Check parameters, define default colors. IF N_Elements(theText) EQ 0 THEN theText = 'Button' IF N_Elements(bgcolor) EQ 0 THEN bgcolor = 'background' IF N_Elements(fgcolor) EQ 0 THEN fgcolor = 'opposite' ;; Get the current hardware font. wTLB = Widget_Base() wBtn = Widget_Button(wTLB) font = Widget_Info(wBtn, /FontName) Widget_Control, wTLB, /Destroy ;; Find how high the bitmap needs to be for ascenders and descenders ;; (highest and lowest points of characters) in this font Window, XSize=100, YSize=100, /Pixmap, /Free, Retain=2 Device, Set_Font=font y0 = 15 XYOutS, 0, y0, 'Ay', /Device, Font=0 ; Test with high and low letters bwWindow = TVRD() ; Black background, white text WDelete, !D.Window IF !Order EQ 1 THEN bwWindow = Reverse(bwWindow, 2) ; Handle !Order=1 whRowUsed = Where(Max(bwWindow, Dimension=1) NE 0) minY = Min(whRowUsed, Max=maxY) ;; Calculate sizes and starting position border = 2 ; Width of border around text xSize = (Get_Screen_Size())[0] ; Maximum width of button text ySize = (maxY-minY+1) + border*2 x0 = border y0 = border+(y0-minY) ;; Make window, draw text, read back Window, XSize=xSize, YSize=ySize, /Pixmap, /Free, Retain=2 Erase, cgColor(bgcolor) blankRGB = TVRD(True=3) XYOutS, x0, y0, theText, /Device, Font=0, $ Color=cgColor(fgcolor) textRGB = TVRD(True=3) WDelete, !D.Window text2D = Total(textRGB NE blankRGB, 3) whereX = Where(Total(text2D, 2) NE 0, nWhereX) ;; Prepare result IF nWhereX EQ 0 THEN $ ; Nothing visible: Return one column result = blankRGB[0, *, *] $ ; ELSE $ ; Else return width used plus ; border (plus two extra pixels ; to make Windows button look OK) result = textRGB[0:(whereX[nWhereX-1]+border+2) < (xSize-1), *, *] ;; Compensate for reversal if !Order is 1 IF !Order EQ 1 THEN result = Reverse(result, 2) Return, result END